package com.itheima.reggie.controller;


import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")//上传地址是common
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;


    //文件上传
    @PostMapping("/upload")//临时目录转存到指定位置
    public R<String> upload(MultipartFile file) {//前端参数名字一致
        log.info(file.toString());
        //原始文件名

        String originalFilename = file.getOriginalFilename();
        String sub = originalFilename.substring(originalFilename.lastIndexOf("."));
        //UUid重新生成

        String s = UUID.randomUUID().toString() + sub;
        //创建一个目录对象
        File dir = new File(basePath);
        //判断当前目录是否存在
        if (!dir.exists()) {
            dir.mkdirs();
        }

        try {
            //转存
            file.transferTo(new File(basePath + originalFilename));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(s);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {
        response.setContentType("image");

        try {
            FileInputStream fis = new FileInputStream(new File(basePath + name));
            ServletOutputStream os = response.getOutputStream();
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fis.read(bytes)) != -1) {
                os.write(bytes, 0, len);
                os.flush();
            }

            os.close();
            fis.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
